Wrench



June 23, 1925.

J. W. KAOUGH WRENCH Filed Nov. 8, 1923 2 Sheets-Sheet 1 inventorJW/faaww June 23, 1925.

1,543,210 J. W. KAOUGH WRENCH A Filed Nov. 8, 1925 2 Sheets-Sheet 2(1H0: new

Patented June 23, 1925.

UNITED STATES PATENT OFFICE.

I JOSEPH W. KAOUGH, OF DALLAS, TEXAS, ASSIGNOR TO THE GUIBERSON CORPORATION, OF DALLAS, TEXAS, A CORPORATION DIE-DELAWARE.

' WRENCH.

Application filed November s, 1923. Serial No. 673,609.

To all whom it may concern:

Be it known that I, JOSEPH W. KAOUGH, citizen of the United States ofAmerica, residing at Dallas, in the county of Dallas and 'State ofTexas, have invented certain new and useful Improvements in Wrenches,

of which the following is a specification.

This invention relates to new-and useful improvements in wrenches.

The invention has particularly to do with that type of Wrench which isdesigned for use on pipes, well casing and tool joints, or othercylindrical objects which are used in a perpendicular position.

, A particular object of the invention is to provide a pair of clampingjaws each having' closing fingers, whereby the jaws are closed in unisonand a wide range of pipe sizes may be handled in an expeditious manner.

Another object is to provide means for intermeshing the free ends of theclamping jaws, whereby they are prevented from sagging, together with aself-latching device plication filed of even date herewith.

A construction designed to carry out the invention will be hereinafterdescribed together with other features of the invention.

The invention will be more readily understood from a reading of thefollowing specification and by reference to the accompanying drawings,in which an exampleof the invention is shown, and wherein:

Fig. 1 is a 'plan view of a wrench constructed in accordance with myinvention,

Fig. 2 is a side elevation of the same,

Fig. 3 isan enlarged View of the head and jaws,

Fig. 4 is' a detail of a modified form of jaw mounting,

Fig. 5 is a sectional view on the line 5-5 of Fig. 4,

Fig. 6 is another modification of the jaw mounting, and

Fig. 7 is an end view of the same. In the drawings the numeral 10designates a head having cheek plates 11 connected at one side by a web12 and at the other side by a web 13, thus providing a I space betweenthe plates extending longitudinally through the head. The head has aconcaved seat 14 at its forward portion.

A lug 15 is formed on the extreme left hand has dies 20 and acomparatively deep concavity 17 in'its gripping face located betweensaid dies. This permits thejaw to engage and grip pipes of-variousdiameters, the term pipe being used generically for any cylindricalarticle.

A pair of'clamping jaws 21 and 22, respectively, are mounted on thehead. The jaw 21- has ears 23 counter-sunk in the ears 16 and mounted onthe bolt 19, so as to be substantially flush -with the cheek plates.

The jaw 22 has ears 24 engaging on the bolt 19 passing through the lug15. The free end of the jaw 22 has a converging socket 25 which receivesthe reduced and beveled end 26 of the jaw 21 atthe center of the wrench,whereby sagging Qfthe jaws is prevented. The jaw 21 has a hook latch 26'on its reduced end which engages in a keeper 27. The 'keeper is pivotedon the free end of the jaw 22. A yoke spring 28 has one end straddlingthe latching-end of the keeper and its inner end embracing the jaw 22,while the sides of the spring are coiled about the pivot of the keeper.The ends of thehook. and keeper are sufliciently rounded to cause aneasy self-latching action when the clamping jaws are swung together.

The jaws 21 and 22 have dies 21' and 22 respectively, and each has'aconcavity 21 extending to its free end. These concavities register whenthe jaws are closed and form a continuous arc. In each concavity is adie 22. This structure permits the jaws to firmly grip various diametersof p p Animportant feature of the invention resides in jaw closingfingers 29 formed on the pivoted ends of the clamping jaws and arrangedin pairs so as to straddle the check plates when said jaws are closed.When the jaws are opened the fingers are swung into the path of thepipe.

The gripping jaw 17 has an inner curved face 39 in position to beengaged by a dis placing member 40 on the inner end of a handle 42mounted on a pin 41 secured in the head. The member 40 is sufficientlybroad to displace the jaw 17 from the seat 14 and into gripping positionwhen the handle is swung. While I haveshown the handle and the member40, it is to be understood that any means may beused for displacing thejaw 17.

It is desirable to hold the handle 42' against swinging and the head incentral position and while any suitable means may be used for thispurpose, I have found a spring latch bolt to give satisfactory results.On the handle is mounted a housing 44 in which a pair of headed bolts 45are mounted to slide.

The cheek plate on this side has a stud 46 on its inner end relativelybetween the bolts. Each'bolt has a coiled compression spring 47 confinedthereon and bearing against the housing and tending to withdraw thebolts from the path of the stud. An abutment plate 48 is fastened on thehandle 42. Each bolt 45 has a hand hook 49 and by grasping either ofthese, the bolt thereof may be dlsplaced against the tension of itsspring 47 and caught against the edge of the plate 48, whereby the headof the bolt will be held in the path of the stud. By displacing bothbolts the head 10 and the handle will be engaged for unitary movement.When only one of the bolts is displaced the handle is free to swingindependently in one direction only. As is shown in Fig. 1, the righthand bolt 45 is displaced and when the handle is swung to the left thehead will also be swung therewith, but when the handle is swung to theright the head 10 will remain (relatively) stationary and the member 41will fulcrum on its pin 41, forcing the jaw 17 into action.

In Figs. 4 and 5 I have shown a modified form in which the jaw 17 isshown with a lug 50 extending outwardly of ears 16' formed on the head.The jaw 17 has a slot 17 in which a bushing 51 is confined on a pin 19which latter projects beyond the ends of the bushing and has its endsconfined in the ears 16' as is shown in Fig. 5. One end of the pin isfastened by a set screw 52. The ends of the pin being flush with theouter faces of the plates 11, allow the fingers 29 of the clamping jaw21 to swing thereover. The jaw 21 is pivoted on the end of the lug 50 bya bolt 53. This 211" rangement permits the jaws to undergo a rotarymovement circumferentially of the pipe in gripping the same and alsoincreases the amplitude of the swing of the gripping aw. 1 In Figs. 6and 7 another modification is shown in which the head has a lug 60extending from its right hand end and which receives the forked end ofthe jaw 21. The gripping jaw 17 is pivoted on a pin 61 hav ing its endsconfined in the cheek plates 11. This pin is held by a set screw 62 inone of the plates. The fingers 29 of the jaw 21 swing over the platesand the ends of the pin 61, and said jaw 21 is pivoted on a bolt 63mounted in the lug 60. This form has the advantage of two bearing pointsfor the fulcrums of the jaws and also offers more metal for the parts atthese points.

In using the wrench the clamping jaws 21 and 22 are swung open as isshown in the dotted lines in Fig. 3. The head 10 is moved toward thepipe which is engaged by the fingers 29 which latter were swung into itspath when the jaws were opened. As the movement of the head toward thepipe is continued the fingers are displaced, whereby the jaws 21 and 22are swung in behind the pipe until the hook 26 engages in the keeper 27and the clamping jaws are thus fastened as is shown in full lines inFig. 3 and in full lines in Fig. 1.

The bolts 45 are both engaged with the lug 46 during the jaw-closingmovement,

but in order to swing the member 40 and displace the jaw 17 to grip thepipe, one of the bolts 45 must be retracted, according to the directionin which it is necessary to swing the handle 42. When the handle isreleased it may be swung and the pipe firmly gripped.

It is obvious that other latching means could be used and various otherchanges, modifications and alterations may be made within the scope ofthe appended claims.

What I claim, is:

7 1. In a wrench, the combination of a head having a seat, an arcuategripping jaw swinglng through the-seat, means including a handle fordisplacing the gripping jaw into gripping position, a pair of selflatching clamping jaws pivoted on the head, and

aw closing fingers carried by the clamping aws.

2. In a wrench, the combination of a head having a seat, an arcuategripping jaw swinging throu h the seat, means including a handle forisplacing the gripping jaw into gripping position, a pair of clampingjaws pivoted on the ends of the head, means for latching the free endsof the clamping jaws, and jaw closing fingers carried by the clan'ipingjaws.

3. In a wrench, the combination of a head having a seat, an arcuategripping jaw swinging through the seat, means including a handle fordisplacing the gripping jaw into gripping position, a pair of clampingjaws pivoted on the ends of the head, a hook latch on the free end ofone of the clamping jaws, a self-latching keeper on the free end. of theother ciainping jaw engaged by the hook when the jaws are closed, andjaw closing fingers carried by the clamping jaws,

In a wrench, the combination of a head having seat, an arcnate grippingjaw swinging through the seat, means including a handle for displacingthe gripping jaw into gripping position, a pair of clamping jaws pivotedon the ends of the head, a hook latch on the free end of one of theclamping jaws, a self-latching keeper on the free end of the otherclamping jaw engaged by the hook when the jaws are closed, jaw closingfingers carried by the damping jaws, and a socket on the free end of onethe clamp ing jaws receiving the end of the other clamping aw,

5. In a wi ench, the combination of a head having a seat, an arcuategripping jaw pivoted in the head and having a concavity in its face anddies at each end of the concavity, means in-the head for actuating thegripping jaw, a pair 0t clamping jaws piv oted on the ends of the headand having pipe receiving concavities in their faces, means forfastening the free ends of the clamping jaws together, and jaw ciosingfingets carried by the pivoted ends of the clamping jaws.

6, In a wrench, the combination of a head having a seat, an arcuategripping jaw pivoted in the head and having a concavity in its face anddies at each end of the ooncavity, means in the head for actuating thegripping jaw, a pair of clamping jaws pivoted on the ends of the headand having pipe receiving concavities, in their faces, dies in theeoncavities ot the clamping jaws,

means for fastening the treeends of the.

damping jaws together, and jaw closing fingets carried by the pivotedends of the clamping jaws.

in testimony wheneot ii aiiix my signature.

JQSEPH "W. KAUUGH.

